Nano Pd(0) supported on cellulose: A highly efficient and recyclable heterogeneous catalyst for the Suzuki coupling and aerobic oxidation of benzyl alcohols under liquid phase catalysis

Microstructure-stability relations studies of porous chitosan microspheres supported palladium catalysts

“…The environmental friendly biodegradable carbohydrate polymers such as chitosan, starch and cellulose have attracted considerable attentions as the solid supports with the momentum coming from the rise of green chemistry [14,15]. Chitosan, the second most abundant nature biopolymer in the order of 10 11 metric tons annually only to cellulose, is an ideal solid support for the immobilization of the transition metal catalysts because of their surface polar functional groups such as hydroxyl, amine and carbonyl groups [16][17][18][19].…”

Nanocatalysts for the Suzuki Coupling Reactions

“…Pd-NPs supported on cellulose, the most abundant biomacromolecule, was also found to be a highly efficient recyclable heterogeneous catalyst for the Suzuki coupling between aryl bromides and phenyl boronic acid in water. 121 Tsvelikhovsky and Blum 122 have proposed a microemulsion/sol-gel system for aqueous C C coupling where an emulsion of hydrophobic substrates is subjected to a metal catalyst that has been entrapped within silica containing hydrophobic groups prepared by sol-gel. The surfactant in the microemulsion transports the reactants to hydrophobic porous of the silica containing the catalyst where the reaction takes place.…”

Cellulose Oxidation and the Use of Carboxyl Cellulose Metal Complexes in Heterogeneous Catalytic Systems to Promote Suzuki-Miyaura Coupling and C−O Bond Formation Reaction

“…2 On the other hand, the main challenge of modern catalysis is to achieve environment-friendly processes, using sustainable resources and very active catalysts. [3][4][5][6] In this regard, biopolymers are attractive for use combined with transition metal catalysts for further applications in organic synthesis, fine chemical and flow reactors, [7][8][9][10][11][12][13][14] and cellulose may have a great potential of use in heterogeneous catalysis. The formation of bonds catalyzed by transition metals is considered one of the most important processes in synthetic chemistry, helping to build complex molecules structures from simple precursors.…”

“…Palladium nanoparticles have been supported on cellulose without modification and applied to Suzuki-Miyaura couplings. 8 The modification of cellulose to anchoring palladium species for catalytic application in Suzuki-Miyaura reactions is also reported in different ways, such as cellulose-aluminum oxide composite modified with organic groups, 9 modified carboxymethyl cellulose 19 and functionalized cellulose. 20 In the last decade, the selective oxidation of the primary alcohols of carbohydrates structure into carboxylates using n-oxil-2,2,6,6-tetramethylpiperidine (TEMPO) catalytic oxidation has been reported.…”